Clear the internal package of unused/deprecated things

[froth]

This removes some of the things mentioned in #7031.

I could also replace hashLower in the whole repo as suggested in the comment. This could be done by using CIString for class TransferCoding and class Scheme which would be correct according to RFC, but breaking.

[froth]

private[http4s] def compareField[A, B: Order] is only used in Uri. Could be moved there and made private. Opinions on that?

[armanbilge]

This could be done by using CIString for class TransferCoding and class Scheme which would be correct according to RFC, but breaking.

That sounds right, maybe deserves its own dedicated PR?

private[http4s] def compareField[A, B: Order] is only used in Uri. Could be moved there and made private. Opinions on that?

Sounds good to me 👍 then we can merge this one.

[froth]

This could be done by using CIString for class TransferCoding and class Scheme which would be correct according to RFC, but breaking.

That sounds right, maybe deserves its own dedicated PR?

Yeah, that sounds right.

private[http4s] def compareField[A, B: Order] is only used in Uri. Could be moved there and made private. Opinions on that?

Sounds good to me +1 then we can merge this one.

After having another look at compareField: it is just wrapped again in these cases. I simply replaced by Order.by[A, B](f).compare(a, b) and deleted compareField. Updating Pull request when lint is happy.

[armanbilge]

Thanks!

[froth]

I had some arguments with git while rebasing and in the process pushed a wrong commit. I fixed that but accidentally brought mergify to add module:laws module:ember-core module:circe labels. This PR does not involve these modules. Sorry...